Question 1

The force that holds electrons within atoms is the

Accepted Answer

A)  gravitational force with the nucleus. 
B)  magnetic force between the electrons. 
C)  electrical force with the nucleus. 
D)  nuclear force with the nucleus. 
A)  gravitational force with the nucleus. 
B)  magnetic force between the electrons. 
C)  electrical force with the nucleus. 
D)  nuclear force with the nucleus. C

Question 2

The maximum number of electrons allowed in the n = 1 shell of sodium is

Accepted Answer

A)  2. 
B)  4. 
C)  6. 
D)  8. 
E)  unlimited. 
A)  2. 
B)  4. 
C)  6. 
D)  8. 
E)  unlimited. A

Question 3

The electron was discovered by ________________ (one name) in his study of ____________________ (two words).

Accepted Answer

Thomson, cathode rays or Thompson, cathode rays

Question 4

According to the Bohr model of the hydrogen atom, electrons cannot get closer to the nucleus than a specific distance because

Accepted Answer

A)  electrons are repelled by the nucleus. 
B)  electrons lack the energy to get close to the nucleus. 
C)  electrons must have an angular momentum in their orbits that is not equal to zero. 
D)  when electrons get to the lowest possible orbit, they run out of photons to radiate. 
A)  electrons are repelled by the nucleus. 
B)  electrons lack the energy to get close to the nucleus. 
C)  electrons must have an angular momentum in their orbits that is not equal to zero. 
D)  when electrons get to the lowest possible orbit, they run out of photons to radiate.

Question 5

According to quantum mechanics, people should act like waves, too. The reason we do not exhibit wave properties is that our wavelengths are too small to observe. The reason the wavelengths of people are so small is that when finding the wavelength

Accepted Answer

A)  Planck's constant is small and people masses are much larger than that. 
B)  Planck's constant is small and people move slowly. 
C)  Planck's constant is small and the mass of a person isn't very important. 
D)  Planck's constant is small and people move very fast. 
A)  Planck's constant is small and people masses are much larger than that. 
B)  Planck's constant is small and people move slowly. 
C)  Planck's constant is small and the mass of a person isn't very important. 
D)  Planck's constant is small and people move very fast.

Question 6

Lead (a solid) may be changed into mercury (a liquid) by

Accepted Answer

A)  dissolving the lead in acid so that it loses enough mass to have the same mass as mercury. 
B)  grinding the lead to dust and then melting the dust. 
C)  heating the lead to extremely high temperatures. 
D)  none of these. 
A)  dissolving the lead in acid so that it loses enough mass to have the same mass as mercury. 
B)  grinding the lead to dust and then melting the dust. 
C)  heating the lead to extremely high temperatures. 
D)  none of these.

Question 7

Cathode rays and ___________ are both streams of electrons.

Accepted Answer

The answer of Cathode rays and ___________ are both streams...

Question 8

The energy of a photon is proportional to

Accepted Answer

A)  its wavelength. 
B)  its polarization. 
C)  its frequency. 
D)  its mass. 
A)  its wavelength. 
B)  its polarization. 
C)  its frequency. 
D)  its mass.

Question 9

The Balmer series of spectral lines corresponds to transitions ending in a state of quantum number n= ____________.

Accepted Answer

The answer of The Balmer series of spectral lines corresponds...

Question 10

Alpha rays are

Accepted Answer

A)  de Broglie waves. 
B)  helium atoms stripped of their electrons. 
C)  a form of electromagnetic radiation. 
D)  fast-moving electrons. 
A)  de Broglie waves. 
B)  helium atoms stripped of their electrons. 
C)  a form of electromagnetic radiation. 
D)  fast-moving electrons.

Question 11

A true statement about the modern theory of light is that

Accepted Answer

A)  light can only behave like a particle in atoms. 
B)  light can behave like a wave or a particle depending on the situation. 
C)  light waves do not carry energy but photons can. 
D)  photons do not have a frequency. 
A)  light can only behave like a particle in atoms. 
B)  light can behave like a wave or a particle depending on the situation. 
C)  light waves do not carry energy but photons can. 
D)  photons do not have a frequency.

Question 12

Which is the smallest entity in the following list?

Accepted Answer

A)  Atom 
B)  Electron 
C)  Molecule 
D)  Nucleus 
A)  Atom 
B)  Electron 
C)  Molecule 
D)  Nucleus

Question 13

When an atom has an electron removed, then its net charge is

Accepted Answer

A)  unchanged. 
B)  negative. 
C)  positive. 
D)  It is impossible to remove an electron from an atom. 
A)  unchanged. 
B)  negative. 
C)  positive. 
D)  It is impossible to remove an electron from an atom.

Question 14

Some substances emit radiation without any need to expose the material to other energy sources. We call these substances

Accepted Answer

A)  naturally radioactive. 
B)  noble gases. 
C)  rotationally symmetric. 
D)  thermal equilibrium. 
A)  naturally radioactive. 
B)  noble gases. 
C)  rotationally symmetric. 
D)  thermal equilibrium.

Question 15

Different atoms in the same column of the periodic table of elements

Accepted Answer

A)  have a simple ratio of masses. 
B)  have equal masses. 
C)  have identical chemical properties. 
D)  have similar chemical properties. 
A)  have a simple ratio of masses. 
B)  have equal masses. 
C)  have identical chemical properties. 
D)  have similar chemical properties.

Question 16

A series of transitions in atomic hydrogen that produce emissions all in the ultraviolet portion of the spectrum are those ending in the level

Accepted Answer

A)  n = 1. 
B)  n = 2. 
C)  n = 3. 
D)  n = 4. 
E)  n = 5. 
A)  n = 1. 
B)  n = 2. 
C)  n = 3. 
D)  n = 4. 
E)  n = 5.

Question 17

The form of radiation from naturally radioactive uranium that has the largest mass is _____________ rays.

Accepted Answer

The answer of The form of radiation from naturally radioactive...

Question 18

This form of natural radioactivity will be deflected by a magnetic field.

Accepted Answer

A)  X-rays 
B)  Gamma rays 
C)  Anode rays 
D)  Alpha rays 
A)  X-rays 
B)  Gamma rays 
C)  Anode rays 
D)  Alpha rays

Question 19

X-rays are ___________ waves of _________ wavelength.

Accepted Answer

electromag

Question 20

The energy of a photon is calculated from the product of the constant h times the ________________.

Accepted Answer

The answer of The energy of a photon is calculated...

Exam 18: The Structure of the Atom

The force that holds electrons within atoms is the

The maximum number of electrons allowed in the n = 1 shell of sodium is

The electron was discovered by ________________ (one name) in his study of ____________________ (two words).

According to the Bohr model of the hydrogen atom, electrons cannot get closer to the nucleus than a specific distance because

According to quantum mechanics, people should act like waves, too. The reason we do not exhibit wave properties is that our wavelengths are too small to observe. The reason the wavelengths of people are so small is that when finding the wavelength

Lead (a solid) may be changed into mercury (a liquid) by

Cathode rays and ___________ are both streams of electrons.

The energy of a photon is proportional to

The Balmer series of spectral lines corresponds to transitions ending in a state of quantum number n= ____________.

Alpha rays are

A true statement about the modern theory of light is that

Which is the smallest entity in the following list?

When an atom has an electron removed, then its net charge is

Some substances emit radiation without any need to expose the material to other energy sources. We call these substances

Different atoms in the same column of the periodic table of elements

A series of transitions in atomic hydrogen that produce emissions all in the ultraviolet portion of the spectrum are those ending in the level

The form of radiation from naturally radioactive uranium that has the largest mass is _____________ rays.

This form of natural radioactivity will be deflected by a magnetic field.

X-rays are ___________ waves of _________ wavelength.

The energy of a photon is calculated from the product of the constant h times the ________________.

Physics, the Fundamental Science

Describing Motion

Falling Objects and Projectile Motion

Newtons Laws: Explaining Motion

Circular Motion, the Planets, and Gravity

Energy and Oscillations

Momentum and Impulse

Rotational Motion of Solid Objects

The Behavior of Fluids

Temperature and Heat

Heat Engines and the Second Law of Thermodynamics

Electrostatic Phenomena

Electric Circuits

Magnets and Electromagnetism

Making Waves

Light Waves and Color

Light and Image Formation

The Nucleus and Nuclear Energy

Relativity

Beyond Everyday Phenomena

Filters

The electron was discovered by (one name) in his study of ____ (two words).

X-rays are ___ waves of _ wavelength.